Alexander null ati



June l2, 1928.

A. NULLAU Loom Filed Feb. 18, 192e gwoqmtoz andina Patented June 12, 1 928.

UNITED STATES:

PATENT OFFICE.

ALEXANDER NULLAU, F BERLIN-NIEDERSCHONHAUSEN, GERMANY, ASSIGNOR T0 BERGMANN-ELEKTRIOITDS-WERKE, AKTIENGESELLSCHAFT, OF BERLIN, GER- MANY, A CORPORATION.

Application led February 18, 1926, Serial No. 89,173, and in Germany May 28, 1925.

This invention relates to looms. Itmore` particularly relates to a shuttle actuating device for the loom.

Ordinarily the reciprocating movement of the shuttles inmechanical looms is effected` by means ofimpact devices actuated through eccentrics or cranks from the loom itself.` These impact devices, while operating `very simply and surely, are defective in that their force of impact are dependent upon the speed of the loom. It is impos-sible toac-J quire, with a low rateofrotation, the necessary force of impact, consequently it is. im-` possible when such impact devices are used to run the loom slowly or to stop it except by employing special means for sharply ac` celerating and suddenly stoppingthe looms.

It is old in the art to provide impact devices which are dependent upon the speed of operation of the loom. Also it has been suggested that the impact devices be actuated by means of a spring. In such an arrangement the impact is then given with uniform force independently of theV speed andthe operation 2n will thus be carried on atl any desired low;

speed of the loom. Impact devices so constructed however, are impractical because their inertia is too great for use with a high speed loom drive as commerciallydesired.

An object of this invention yisfto provide means for a loom whereby it willbe possible to utilize such shuttle actuating-devices as' crank or eccentric impact members, which operate dependently on the speed of operation of the loom,`while at the same time, the shuttle movement may be made independ-A ent within certain limits of such speed,thus enablingr the loom to properly operate eficiently at very low speeds.

Other objects and advantages will herein after appear. y y y The invention contemplates providing the shuttle actuating device intended for` normal speed with ,a further `shuttle actuating device adapted to be actuated whenfthe normal speed'i's 'devia-ted from. This: may be accom lished b providing an impact device depen ent on t e rate of rotation of a rotating member of the `loom during high speed use oi.'4 the loom andanotherimpact device independent of the rate of rotation thereof for use during low speed operation of the loom.

A specific manner in which the above will be accomplished is shown in the accompanying drawing and described in the following specification.

The drawing shows diagrammatically in Figure l the position of the impact device when the loom is started and operating below a predetermined upper limit of low speed; Figure 2 illustrates the posit-ion assumed by the said device when the loom is in operation at speeds above said upper limit of low speed operation and Fig. 3 is a fragmentary detail to an enlarged scale of the star-ting and latch control mechanism.

A drive 4shaft l, fort-he impact device, mounted in suitable bearings on the supporting framework F, has iiXed thereto the tappet 2 and cam disk 3. An impact lever Il is pivoted at itslower end to the framework F, and, intermediate its ends, carries a roller 5 mounted rotatably on the lug 5 to engage the edge ofcam disk 3, a spring 6 secured at itsopposite ends to the framework F and lever 4 serving to hold said lever 4 with its roller 5 in yielding contact against cam disk 3.

A roller 7 rotatably mounted von stub shaft 7 extends perpendicularly from the shaft 7 rotatably mounted on framework F, and is held normally in the path of rotation of the tappet 2 by means of the coil spring S having one end thereof Xed to the frameworkF and the other iixed to shaft 7". The stops S and S,`fixed to shaft 7 and framework F respectively serve to limit the rotation of the shaft 7 to position the roller 7 properly for wiping contact by tappet 2, or for throw by the pusher arm 8 extending from the oscillatory lever 4. A picker or impact arm,9 is fixed to the upper end of shaft 7 The arm 8 is of such length, and the tappet 2 and disk` 3 are so positioned on shaft l that when the roller 5 snaps oil the widest part of cam disk 3 the curved end 8 of arm 8 engages ,roller 7 so far ah'eadof tappet 2 as to push the roller 7 out of the path of tappet 2 and permit the latter to pass' withclit wiping rollers It will therefore, 'he

of the speed of rotation of shat- 1 (speed of operation of the loom), the shutter-v throw `impact of picker 9 wm' leel constant. At high speeds orf operation, the' spring throw. or' the picker may be too sluggish, and it becomes necessary to provide means-y for operating the picker at vspeeds whichy vary directly as the spee'd of operation of the loom. In order to secure this, the start,- ing' Ir'ieclianisiii'of the' loomV is Vco''Ii'strt'icted soE that up to a predetermined upperl litri/tit' of lbw speed'I operation tliet'hiow' of picker 9: ,is controlled' wholly by the,l spring" 6. Aibove'th'is limit", the' lever 1l ivith roll'erA is locked out of operative contac't'y witlil Cain disk and tlie throw of p'ikerf) i's'eff'ect'ed wholly iby wiping coi'itact of tappeti 2 with' roller *y l j f The contiol' pa'nel 10 has one/end of the eetr'ei :lever ri piteted thereto` te4V swing over the control coiit'ajcts 1'2; and the other end 'of' vlever' 11 is s`lidably pivote'd 'to the end' ef e' eidttedgieteiifedre Whitt eidee'pin al'gilid'e bracket 14' ix'ed to` framework" F. e

A let'eh` lever' yp'iveted intermediate the" ends on pin 16 xed toframe workF, has

one; "arnfiY 17 thereof s'lid'able'i'nl a slotI 18 of red 13 and has'jite' @titereinerA heavier1 etree 19p providedI with a lug` 20"adapted t'ffloo'le` over' a projection l21l :toi-med'y on' lever L When Ythe' loom stopped the 'u pper" e'nd 1'872'`of `slot 18 sl'idably engages the upperi edgeof lever arm 17' t`o` hold-the lever' tilted' with-the lu'g'l20out of engagement witlt Eroj'ecti'on 21. VVhenth'e' loom is started' swinging" the vlever 11 upwardly over' contacts 12the latchrod- 13 is pulled vertically. Tlie weiglrlter arm 19 keeps thex lippen edge1 of arm `17 in" contact with' e'nd'- is yef eret is, and" the rues@ iev'vei-ejtttterd the path of projection 2 1. As thelevei 11y isfurtherraised4 to its limit,th`e` lower' efndf; 18. of e'lti' engages Athe lower 'edge of' erml 17 end, heide the ieteth .ieverjdvitiiite' lug 2 0/locked withv projectionf'l. The-outer edge of liig 20"is camshaped sofas' rt'o permit the" projecti`on|21 toy slide into locking e`n`- gegement with ieg etikette/ee the ietgeh lever' ie; peeitieed tot' engagementtherewith; andj a' stop 22 on framework F' prevents` theV weighted arm of the la`tch`lev`er"from-swiilgl ing it beyond theposition where it is adapted` tosnap over' projection 21. A

It will be obvious that'nthve slot 18'is pro# vide'd'fso as to afford a lo'st'motio'nt connec-A teni between the leem etart'idg mettentem'y andthe leverdatchingjmeansiand it will' also be obvious fromy Figg2 thaty Wlienthe lever 4 is latched5 the 'throw/fof picker/"arm 91 is controlled Wholly by wiping co'ntatt' of' tappet 2 with roller 7, and that the speed of operation thereof is in direct proportion to the speed of rotation of shaft 1 and therefore of the loom itself.

Tn operation2` Vhen; the loom started 70 the'latch rod' 13 is` pulled upwardly and the latch lever lowers with the upper edge of its arm' 17 in Contact' with endl 18 ,of slot 18 luntil=itsA said edge contact-s with'A stop' 22. when it will bednvpositioa to' engage vand 75 lock lever 4 as the latter oscillates to the left. The arm 8 is ,then held from yContact with editer 7, ettrtire tappett adp'etetee the picker 9 indirect .proportion to the jspleed ofthe leere'. The' elet lis te provided Lte 80 peiri't frtlierincrease iii'` t'hje speed of the.' loom beyondthe speed at wh'ih'leveil i'sl'os" eine-ted, edd' the' lewe-'r edd rsf" et eli-et is merely engages the lower end'of` arriil'eveif 17 wlieirthej' ldend 'is' operetitget topspeed. 85

'Ii stopping'the loom', as' the lfevijer 11 is Swede dewntetdiy the 'Speed etti-ie leem decreases, but'l the lever 4 i'eiiiains"locked-Y u'ntil fthe` end f8 Ve'gages lever'ariii 17';l after Whittr engagement, further ittfverig er letter tri, reiste' ite e0 eut eff ieeitieg en gageI'ne-nt with' projection' 21:, and' thief'jjjicker ar'in Q is their` brought under' V.ctfiitrol' ofV pring" 6" and" ,remainsL iiiider "silch control ii'til theloom isstolpped. .f p 95 rde levee et meet befeterfiedl in tiejeheek' position? when' the lofin is driven ii'iffthe ppeeitedifeetiea: W The teased for 'this .teleppare'nt" bcaise the engagement of the roller 5 "egeinet the eem dise Weuidpreventi settiI 100 reveifseio'vemnt. Theshiftigof the lever ratte' edeeked peeittedweeid tekepijefeein 'the other direttidn 4ofi rettttio'nf dependently' onthereversal "of the drivein'o'tory by means er eeyetedijdr rede*deedl ferthie pdrpee It is' understood, 'of eottrse; thatthe'lmslould' havev Vtitte-` e'ee'h: impeet dejvieee rn' order te provide' reir btte" retrp'reeermevemedt ef the ehdttlef The 'idventide tilde enables the ieedi'te'tedrven etfeiewer epeedthed weeld- 11e dermeny bej peeeible. rnr e Het' werde,` the"l leerdl meyi te `etetted Slowly eddstepped eiewify. Tile result*y te" that' die' meedeeieei strain ordinarily exertetlion thelo'oih andjo' th'emete'eierbeidgtteetedtdeteby; er'efeiimi;` 115 nete-d; l'beteiueel there ie de neefe'eeiity lef tepid Starting eind suddetti? stepping. It ie ep: parent that operative' ditrb'a'n'ces hereto# fete taking" plete dvt-111* de ieeeee'edl edd that `it will bepossible to `utilizo a smalljjfdriving 12o meter". It stemde-led bef deserved' thet the e'ildpie ideate` erddve deedribed fdreeeeepiiehitg thee'ejedvedtegeelmey be reediiy'id; eteuedeitfldrde:dewin'feperetien. ,t

Id ieL hereby expressly v"Stated end andere: `12e eteedtttet the' intended' ieyeuedeptible df modifications ahd'ajda'ptations" withinY thescop'e off "the ap'pended claiinsf yVMVhatfolaini-fis:

means for operating said device with constant force at all speeds below a predetermined speed of operation of the loom, and mechanism for preventing the operation of said means when the speed of the loom exceeds said predetermined speed.

2. The combination with the apparatus set forth in claim l, of means for operating said shuttle device While the first named means is prevented from operation by said mechanism.

3. In a loom; a shuttle actuating device; spring controlled means for operating said device; means independent of said spring controlled means for operating said device; and mechanism to prevent the effective operation of either of said means during the operation of the other.

4. In a loom; a shuttle actuating device; means operable with constant force for operating said device; means independent of the first named means for operating said device; and mechanism to prevent simultaneous effective operation of said means.

5. In a loom; a support; a Shuttle actuating device pivoted on said support; a member pivoted on said support; mechanism for oscillating said member to operate said device; means independent of said member for operating said device, said member preventing effective operation of said means while the member is in operation; and means to prevent operation of said member when the speed of the loom exceeds a predetermined limit.

6. In a loom; a shuttle actuating device; means capable of operating said device with constant force at all speeds of the loom; and mechanism for holding said means inoperative when the speed of' the loom exceeds a predetermined limit and when the loom is reversed.

7. In a loom, a support, a shaft rotatably mounted thereon; a picker fixed to said shaft; means for holding said shaft yieldingly in a predetermined angular position, an arm extending perpendicularly from said shaft, spring controlled member engageable with said arm to oscillate said shaft, a tappet rotatable tohave intermittent impinge contact with said arm; means for rotating said tappet; and mechanism to prevent Simultaneous engagement of said member and tappet with said arm.

In testimony whereof I affix m signature.

ALEXANDER ULLAU. 

